sir

adj

1. Initialism of susceptible-infected/infectious-removed/recovered.

name

1. Initialism of Special Intensive Revision, a voter-roll revision process in India.

   “The Kerala government has moved the Supreme Court seeking a direction to the Election Commission (EC) of India to defer the conduct of the Special Intensive Revision (SIR) of the electoral rolls of the State. The State said the conduct of the “cumbersome” SIR process from November 4 to December 4 would coincide with the elections to the local bodies in Kerala. The simultaneous conduct of both exercises would not only strain human resource but also create an “administrative impasse” with no personnel left to take care of the day-to-day functioning of the government. The government said the simultaneous conduct of the SIR and the local body elections would be an “near- impossibility”.”

noun

1. Initialism of surface insulation resistance.
2. Abbreviation of silent information regulator.

verb

Etymology: From Middle English sir, unstressed form of sire, borrowed from Old French sire (“master, sir, lord”), from Latin senior (“older, elder”), from senex (“old”). Doublet of seigneur, seignior, senhor, senior, señor, senyor, signore, and sire.

1. To address another individual using "sir".

   “Sir, yes, sir! —Don't you sir me, private! I work for a living!”

   “Don't "Sir" me, young man, you have no idea who you're dealing with!”